How old was Mary-Kate Olsen in Billboard Dad?

It's common to wonder how old a celebrity was when they starred in a particular film. That knowledge can reshape how we view their performance. We’ve got the answer you’ve been looking for.

During the filming of Billboard Dad, Mary-Kate Olsen was:

11 years old

That was the real age of the celebrity according to our calculation.

The age shown reflects the celebrity’s age as of the start of the release year of Billboard Dad:

January 1, 1998

And the date of birth of Mary-Kate Olsen, that is:

June 13, 1986

Given that most films are released within a year of production, the actual age of Mary-Kate Olsen during filming may have varied by one year from the shown age.